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OpenAI Releases GPT-5.1 API: Faster, More Steerable, and Enhanced for Coding with New Tools

OpenAI has announced the immediate availability of GPT-5.1 in its API. This new iteration is touted as a significant upgrade, offering improved speed, enhanced steerability, and superior coding capabilities. It also comes equipped with practical new tools. OpenAI suggests that GPT-5.1 will be particularly beneficial for developers creating applications or agents where intelligence, speed, and cost-effectiveness are critical factors, promising a meaningful upgrade for such use cases.

OpenAI Developers(@OpenAIDevs) - OpenAI Developers (@OpenAIDevs)
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GPT-5.1 is now available in the API. It’s faster, more steerable, better at coding, and ships with practical new tools. If you’re building apps or agents where intelligence, speed, and cost matter, GPT-5.1 should feel like a meaningful upgrade.

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GPT-5.1 and Specialized Codex Models Now Accessible via API with GPT-5 Pricing; Enhanced Prompt Caching Introduced

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